Import Javax.Microedition.Midlet.*;

import javax.microedition.midlet.*;

import javax.microedition.lcdui.*;

public class itax extends MIDlet implements CommandListener

{

private Display display;

private Form main;

private Form main1;

private Command exit;

private Command calculate;

private Command back;

private Command reset;

private TextField tname;

private TextField tage;

private TextField tmin;

private TextField tperks;

private TextField tded;

private TextField tmedi;

private TextField tihsg;

private TextField ttax;

private TextField ttaxinc;

private ChoiceGroup gender;

private int currentgender;

public itax()

{

display=Display.getDisplay(this);

exit =new Command("Exit",Command.EXIT,1);

calculate =new Command("Calculate",Command.SCREEN,1);

back =new Command("Back",Command.SCREEN,1);

reset =new Command("reset",Command.SCREEN,1);

tname = new TextField("name","",30,TextField.ANY);

tage = new TextField("age","",3,TextField.NUMERIC);

tmin = new TextField("Monthly Income","",10,TextField.NUMERIC);

tperks = new TextField("Perks","",10,TextField.NUMERIC);

tded = new TextField("Deductions (80c)","",10,TextField.NUMERIC);

tmedi = new TextField("Mediclaims","",5,TextField.NUMERIC);

tihsg = new TextField("Interest on housin loan","",10,TextField.NUMERIC);

ttax = new TextField("TAX","",30,TextField.ANY);

ttaxinc = new TextField("TAXABLE INCOME","",30,TextField.ANY);

gender =new ChoiceGroup("Select your gender",Choice.EXCLUSIVE);

gender.append("Male",null);

gender.append("Female",null);

main = new Form("Main");

main1 =new Form("MAIN1");

main.append(tname);

main.append(tage);

main.append(tmin);

main.append(tperks);

main.append(gender);

main.append(tded);

main.append(tmedi);

main.append(tihsg);

main1.append(ttaxinc);

main1.append(ttax);

main.addCommand(exit);

main.addCommand(calculate);

main.addCommand(back);

main.addCommand(reset);

main1.addCommand(exit);

main1.addCommand(calculate);

main1.addCommand(back);

main1.addCommand(reset);

main.setCommandListener(this);

main1.setCommandListener(this);

}

public void startApp()

{

display.setCurrent(main);

}

public void pauseApp()

{

}

public void destroyApp(boolean unconditional)

{

notifyDestroyed();

}

public void commandAction(Command command,Displayable displayable)

{

try

{

if(command==exit)

{

destroyApp(true);

}

else

if(command==calculate)

{

display.setCurrent(main1);

currentgender= gender.getSelectedIndex();

String same =tname.getString();

String sgender=gender.getString(currentgender);

String smin =tmin.getString();

double imin=getNumber(smin);

String sperks =tperks.getString();

double iperks=getNumber(sperks);

String sded =tded.getString();

double ided=getNumber(sded);

String smedi =tmedi.getString();

double imedi=getNumber(smedi);

String sihsg =tihsg.getString();

double iihsg=getNumber(sihsg);

if(iihsg>150000)

iihsg=150000;

if(ided>100000)

ided=100000;

if(imedi>15000)

imedi=15000;

double taxableincome=(12*imin)+iperks-iihsg-ided-imedi;

double tax=0;

if(sgender=="Male" )

{

if(taxableincome>150000 & taxableincome<=200000)

tax =taxableincome*0.10;

if(taxableincome>200000 & taxableincome<=300000)

tax =taxableincome*0.20;

if(taxableincome>300000)

tax =taxableincome*0.30;

}

else

if(sgender=="Female")

{

if(taxableincome>175000 & taxableincome<=200000)

tax =taxableincome*0.10;

if(taxableincome>200000 & taxableincome<=300000)

tax =taxableincome*0.20;

if(taxableincome>300000)

tax =taxableincome*0.30;

}

String s="";

s=s+tax;

ttax.setString(s);

s="";

s=s+taxableincome;

ttaxinc.setString(s);

}

if(command ==reset)

{

tname.setString("");

tage.setString("");

tmin.setString("");

tded.setString("");

tperks.setString("");

tmedi.setString("");

tihsg.setString("");

}

if(command== back)

{

display.setCurrent(main);

}

}

catch(Exception e)

{

}}

private double getNumber(String str)throws NumberFormatException

{

double val=Double.parseDouble(str);

return val;

}}

Output